/*
 * Copyright (c) 2021 VMware, Inc.
 * SPDX-License-Identifier: MIT
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */

package com.vmware.ddlog.ir;

import com.facebook.presto.sql.tree.Node;

import javax.annotation.Nullable;
import java.util.Objects;

public class BodyTermVarDef extends BodyTermCondition {
    private final String var;
    private final DDlogType exprType;
    private final DDlogExpression expr;

    public BodyTermVarDef(@Nullable Node node, String var, DDlogExpression expr) {
        super(node, new DDlogESet(node,
                new DDlogEVarDecl(node, var, expr.getType()),
                expr));
        this.var = var;
        this.expr = expr;
        this.exprType = Objects.requireNonNull(expr.type);
    }

    public DDlogType getExprType() {
        return this.exprType;
    }

    public String getVar() {
        return this.var;
    }

    @Override
    public void accept(DDlogVisitor visitor) {
        if (!visitor.preorder(this)) return;
        this.exprType.accept(visitor);
        this.expr.accept(visitor);
        visitor.postorder(this);
    }

    public DDlogExpression getRhs() {
        return this.expr;
    }
}
